Wholesome in bulk™ Ashwagandha Root Powder and Root Extract
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Bulk Ashwagandha Root Powder and Root Extract for Supplement Manufacturing
Ashwagandha is a light brown botanical powder made from the dried root of Withania somnifera (L.) Dunal, a shrub in the nightshade family. You can order it as milled root powder or as a root extract standardized to withanolides, a group of natural compounds in the root. We supply both forms in bulk to supplement brands, contract manufacturers, and formulators. You can request testing documents and samples on the quote form.
A root ingredient you can specify by part, grade, and method
Ashwagandha is one of the most widely traded botanicals in the supplement market. Buyers can define it clearly by plant part, marker compounds, and test method. That makes supplier comparison and lot approval easier.
Root only identity
Commercial supply uses the root of Withania somnifera. Leaves and stems have a different chemical profile, so root only material is the standard most specifications ask for.
Measurable marker compounds
Withanolides are the marker compounds named in most specifications. HPLC measures them against reference standards, which gives every lot a number you can compare.
Two forms, one listing
Root powder is dried, milled root with nothing removed. Root extract is concentrated and standardized, so you can hit a stated withanolide target in a smaller fill.
Common extract grades
Extracts are widely traded at 2.5% and 5% withanolides by HPLC. Some 2.5% grades are sold as meeting the USP monograph for powdered ashwagandha root extract.
Clear processing route
Extracts are usually made with water or water and ethanol, then dried to a powder. About 10 kg of root yields roughly 1 kg of extract.
Known sensory profile
Expect a light brown to brown powder with a characteristic odor and a bitter, earthy taste. It is only slightly soluble in water, which suits capsules and tablets.
Where formulators use ashwagandha root powder and extract
Both forms fit measured formats where fill weight and serving size are controlled, including:
- Capsules
- Compressed tablets
- Single ingredient powders
- Multiple ingredient botanical blends
- Stick packs and sachets
- Powdered drink mixes, after taste trials
- Gummies, after taste and stability trials
- Private label programs
Plan fill weights from the confirmed assay on each COA. Root powder and a 5% extract are not interchangeable gram for gram, and neither are a 2.5% and a 5% extract. Recalculate your serving math whenever you change form or grade.
What to check before you buy ashwagandha
Powders sold under the same name can differ in plant part, assay method, solvent, and carrier. Review these points together, and ask for lot documents before you approve a supplier.
Plant part on paper
Confirm Withania somnifera root on both the specification and the certificate of analysis (COA). Ask for a written statement that no leaf or stem is added.
Root identity by HPTLC
An HPTLC fingerprint compared with a root reference standard confirms identity. A flavonol glycoside limit test adds a second check, because these compounds occur in the aerial parts and not in the root.
Withanolide method
Ask whether withanolides are measured by HPLC or by a gravimetric (weighing) method. The two give different numbers for the same material, so compare grades only within one method.
Solvent, ratio, and carrier
Confirm the extraction solvent and the native extract ratio. Ask whether a carrier, such as maltodextrin, is added to reach the stated grade.
Contaminant limits
Check heavy metals by ICP-MS, microbial limits by USP methods, pesticide residues, and residual solvents. Compare each limit with your own finished product specification.
Origin and source rules
Most bulk ashwagandha comes from India, where regulators moved in 2026 to restrict leaf use in foods. Ask for the country of origin and a root only declaration for your supplier file.
Branded or generic: Branded ashwagandha extracts are sold under their owners' trademarks. Generic root extracts cannot use those names on your label. If your formula calls for a branded extract, source it from the brand owner or its licensed distributors.
Typical specification for ashwagandha root extract and powder
These values reflect a common 5% withanolides root extract, with root powder limits noted where they differ. Final figures come from the specification sheet and COA for your lot. NLT means not less than, and NMT means not more than.
| Parameter | Specification | Method |
|---|---|---|
| Botanical source | Withania somnifera (L.) Dunal, root | HPTLC fingerprint |
| Form | Root extract powder, or milled root powder | Supplier declaration |
| Appearance | Light brown to brown fine powder, characteristic odor | Visual |
| Withanolides (extract) | NLT 5.0% | HPLC |
| Flavonol glycosides (leaf marker) | NMT 0.04% in extract, NMT 0.01% in root powder | HPLC limit test (USP) |
| Extraction solvent | Water, or water and ethanol | Supplier declaration |
| Native extract ratio | About 10:1 | Supplier declaration |
| Carrier | None, or as named on the specification sheet | Supplier declaration |
| Particle size | NLT 95% through 60 or 80 mesh | USP <786> |
| Loss on drying | NMT 5.0% | USP <731> |
| Bulk density | 0.30 to 0.60 g/mL | USP <616> |
| Lead | NMT 3.0 ppm | ICP-MS |
| Arsenic | NMT 2.0 ppm | ICP-MS |
| Cadmium | NMT 1.0 ppm | ICP-MS |
| Mercury | NMT 0.1 ppm | ICP-MS |
| Total aerobic count | NMT 10,000 cfu/g for extract, NMT 100,000 cfu/g for root powder | USP <2021> |
| Yeast and mold | NMT 1,000 cfu/g | USP <2021> |
| E. coli and Salmonella | Negative in 10 g and 25 g | USP <2022> |
| Pesticide residues | Meets USP <561> | GC-MS and LC-MS |
| Shelf life | 24 to 36 months, unopened | Stability data |
Quality standards for ashwagandha root and root extract
The USP-NF has three ashwagandha monographs: the root, the powdered root, and the powdered root extract. Each one measures withanolides by HPLC and asks the label to name the plant part.
USP Powdered Ashwagandha Root Extract
The extract may be made with methanol, alcohol, water, or a mix of these. It must hold NLT 2.5% withanolides by HPLC, calculated on the dried basis. Loss on drying is NMT 6.0% after 3 hours at 105 °C. Total aerobic count is NMT 10,000 cfu/g, with yeast and mold at NMT 1,000 cfu/g.
How USP counts withanolides
The HPLC assay reads at 227 nm and adds up eight named compounds. Five aglycones, including withaferin A and withanolide A, are read against a withanolide A standard. Three glycosides, withanosides IV, V, and VI, are read against withanoside IV. A gravimetric (weighing) result measures something else, so it is not the same number.
USP Powdered Ashwagandha Root
Milled root must hold NLT 0.3% withanolides on the dried basis. Total ash is NMT 7.0%, acid insoluble ash NMT 1.0%, and loss on drying NMT 12.0%. Alcohol soluble extractives must reach NLT 10.0%. Total aerobic count is NMT 100,000 cfu/g.
A limit for leaf markers
Later USP revisions added a limit for three flavonol glycosides found in the leaves and stems but not in the root. The limit is NMT 0.04% in extract and NMT 0.01% in powdered root, by HPLC at 350 nm. These compounds also show up in water extracts of leaf, which a chlorophyll check on an HPTLC plate can miss.
Identity and authenticity
In USP identity test A, the TLC plate shows five grayish blue bands at Rf about 0.12, 0.29, 0.47, 0.67, and 0.73. Test B matches HPLC peaks to withanolide A and withanoside IV. In October 2025, BAPP (the botanical adulterants program run by ABC, AHP, and NCNPR) reviewed 22 lab methods for the root. Its guidance notes that a withanolide assay alone cannot confirm root only material.
Contaminant limits to build on
USP <2232> sets component limits of 0.5 µg/g for lead and cadmium. It sets 1.5 µg/g for inorganic arsenic and total mercury, for products taken at up to 10 g a day. Smaller daily amounts can meet the chapter's daily limits at higher per gram levels, so check lot results against your own serving size. The extract monograph also requires aflatoxins and pesticide residues to meet USP <561>, and residual solvents to meet USP <565>.
Sourcing and processing practices for ashwagandha
Ashwagandha quality is set at harvest, during drying, and by the choice of solvent. These practices give QA teams specific points to ask about and verify.
Cut below the crown
Leaf and stem can enter a lot when roots are cut too far above the ground at harvest. Ask how roots are topped and how stem pieces are sorted out before milling. A root only declaration carries more weight when it names the harvest step behind it.
Know the growing district
BAPP figures from 2019 put more than 5,000 hectares of the crop in the Neemuch and Mandsaur districts of Madhya Pradesh. India as a whole grew about 10,770 hectares, for about 8,429 tonnes a year. Ask for the district of origin as well as the country.
Grade and dry the root
Dried root is sold by grade, and thin, woody root trades at a discount. Surface mold on roots has been noted in samples from humid growing areas such as Kerala. Ask which root grade went into your lot and how fast the roots were dried.
Match the solvent to the target
USP allows methanol, alcohol, water, or blends of these. In one comparison of water and alcohol blends, the blend that gave the most extract was not the one that gave the most withanolides. Some branded root grades use water alone. Ask for the solvent and ratio in writing, and for a GC residual solvent result whenever methanol is used.
Pack for moisture
Water based root extract picks up moisture and can clump. In one six month stability trial, withaferin A and withanolide A fell under both real time and accelerated conditions. Some HPLC fingerprint peaks shifted by more than 20%. Pack in sealed liners and ask for the real time data behind any shelf life figure.
Ask how microbes were controlled
USP allows a total aerobic count ten times higher for milled root than for extract. Root powder often needs a microbial step, so ask whether the lot was steam processed or irradiated. Some extract sheets state that the material is not irradiated. Keep that statement in the lot file.
Formulator tips for ashwagandha
Use these points when you set label amounts, fill weights, and incoming tests. Most figures below come from USP monographs and published supplier sheets.
- Buy on the same method your finished product lab will use. If that lab runs the USP HPLC method, ask for an HPLC withanolide result on every lot, so incoming and release figures match.
- Check the basis. USP reports withanolides on the dried basis, so a 5.0% dried result reads about 4.7% as is at 6% moisture.
- Do not swap grades gram for gram. Some branded extracts are set as withanolide glycosides at about 11 to 35%, which is a different basis from 5% total withanolides.
- Plan capsule fill from bulk density. Supplier sheets give 0.30 to 0.60 g/mL bulk and 0.40 to 0.80 g/mL tapped. At those figures, 600 mg of extract needs about 0.75 to 2.0 mL of fill volume.
- Water extracted grades pick up moisture fast. Blend in a dry room and close liners after each use. Check loss on drying on receipt against the NMT 5.0% figure in the spec table.
- Expect a bitter, acrid taste from milled root, with a slightly mucilaginous feel, as the USP description states. Run taste trials before you set the level in powders and drink mixes.
- Set an incoming test plan. Run HPTLC root identity with a leaf comparison and an HPLC withanolide assay on every lot. Add the flavonol glycoside limit test for each new supplier and at set intervals.
- Recheck withanolides by HPLC and loss on drying before you use stock past its retest date. Withanolide levels in water extracts can drift during storage.
Helping shoppers read an ashwagandha label
Brands and their customer service teams field the same label questions again and again. These answers stick to what the ingredient is and how it is labeled.
What the label line means
A typical line reads ashwagandha root extract (Withania somnifera) (root), standardized to 5% withanolides. USP labeling asks for the Latin name and the plant part. Products that use leaf as well as root should name both parts.
How to read the percentage
Multiply the extract amount by the percentage to get withanolides per capsule. 500 mg of extract at 5% gives 25 mg of withanolides. A note such as "by HPLC" tells you how the figure was measured.
Independent quality programs
Programs such as the USP Dietary Supplement Verification Program and NSF/ANSI 173 certification check finished products against their labels and contaminant limits. USP also publishes monographs for ashwagandha root and root extract, which brands can cite in their own specifications.
Normal look, taste, and home storage
Milled root is grayish to light brown, and extract runs light brown to brown. Both taste bitter and have a characteristic odor. Keep the bottle tightly closed in a cool, dry place away from light, which matches the USP storage wording.
Storage and handling for bulk ashwagandha
Root powders and extracts keep well when they stay sealed, dry, and out of light. These steps keep the powder in good condition between production runs.
Keep it sealed
Close the inner liner after each use and press out the air. Extract powder picks up moisture from the air and can cake when left open.
Store cool and dry
Keep bags off the floor in a dry room, away from heat sources. Follow the temperature range on the spec sheet.
Keep away from light
Leave the powder in its original opaque packaging. Light and heat can shift color and assay over time.
Rotate stock
Record the lot number and retest date for each bag. Send older lots to production first.
Ashwagandha buyer FAQ
Quick answers to the questions procurement and quality teams ask most.
What is the difference between ashwagandha root powder and root extract?
Root powder is dried, milled root, while root extract is a concentrated powder standardized to withanolides. Extract lets you state a withanolide amount per serving in a smaller fill. Root powder suits formulas that list whole root by weight.
Which withanolide grade should I choose, 2.5% or 5%?
Choose the grade that fits your label target, capsule size, and cost per finished serving. Some 2.5% grades are sold as meeting the USP monograph, and 5% lets you use less powder. Compare grades only when both are measured by HPLC.
How do you confirm the extract is made from root only?
Root identity is checked with an HPTLC fingerprint against a root reference standard, plus a flavonol glycoside limit test. These compounds occur in the leaves and stems, so a low result is consistent with root only material.
Is this a branded ashwagandha extract?
No, this listing is a generic ashwagandha root ingredient. Branded extract names belong to their owners and cannot be used for generic material. Tell us on the quote form if your formula needs a branded extract.
Does ashwagandha extract dissolve in water?
Ashwagandha extract is only slightly soluble in water, so it may settle in clear liquids. It is easiest to use in capsules, tablets, and dry blends. Run a taste trial for drink mixes, because the flavor is bitter and earthy.
Is there a USP monograph for ashwagandha root extract?
Yes. The USP-NF includes Powdered Ashwagandha Root Extract, alongside monographs for the root and the powdered root. The extract must hold NLT 2.5% withanolides by HPLC on the dried basis, and later revisions add a leaf marker limit of NMT 0.04%.
How much extract do I need for a 30 mg withanolide label amount?
You need 600 mg of a 5% grade, before any overage. Divide the label amount by the assay: 30 mg divided by 0.05 equals 600 mg. A 2.5% grade needs 1,200 mg, so check that your capsule size can hold it.
What documents can I get with an order?
A certificate of analysis (COA) and a specification sheet ship with every order. An allergen statement and a safety data sheet may also be available, depending on the lot in inventory. Contact us to request them.
Can I get a sample before a bulk order?
You can request one by choosing sample options on the quote form. We will confirm availability, size, and timing.
How should I store an opened bag?
Close the liner, press out the air, and keep the bag in a cool, dry place away from light. Use the powder within the shelf life shown on the COA.
Request a quote for bulk ashwagandha
Tell us the form, grade, quantity, and timing you need. We will reply with current pricing. Select testing documents and sample options on the quote form.
Order AshwagandhaBulk orders: Choose a pack size above, or use the quote form for larger volumes, testing documents, and sample options. We serve supplement brands, contract manufacturers, product developers, and formulators.
This bulk ingredient is sold for further manufacturing and formulation. The information on this page describes the ingredient and how commercial buyers evaluate it. It is not medical advice. Each finished product brand is responsible for its own labeling and product claims.
